author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 23:06:49 +0200 | |
branch | RCL_3 |
changeset 4 | 50e57c9016d0 |
parent 0 | 0e761a78d257 |
child 8 | 4a7fac7dd34a |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
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* 2000 Wim Taymans <wim.taymans@chello.be> |
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* 2005 Wim Taymans <wim@fluendo.com> |
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* |
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* gstevent.h: Header for GstEvent subsystem |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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#ifndef __GST_EVENT_H__ |
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#define __GST_EVENT_H__ |
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#include <gst/gstminiobject.h> |
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#include <gst/gstformat.h> |
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#include <gst/gstobject.h> |
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#include <gst/gstclock.h> |
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#include <gst/gststructure.h> |
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#include <gst/gsttaglist.h> |
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|
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G_BEGIN_DECLS |
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/** |
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* GstEventTypeFlags: |
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* @GST_EVENT_TYPE_UPSTREAM: Set if the event can travel upstream. |
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* @GST_EVENT_TYPE_DOWNSTREAM: Set if the event can travel downstream. |
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* @GST_EVENT_TYPE_SERIALIZED: Set if the event should be serialized with data |
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* flow. |
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* |
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* #GstEventTypeFlags indicate the aspects of the different #GstEventType |
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* values. You can get the type flags of a #GstEventType with the |
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* gst_event_type_get_flags() function. |
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*/ |
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typedef enum { |
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GST_EVENT_TYPE_UPSTREAM = 1 << 0, |
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GST_EVENT_TYPE_DOWNSTREAM = 1 << 1, |
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GST_EVENT_TYPE_SERIALIZED = 1 << 2 |
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} GstEventTypeFlags; |
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/** |
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* GST_EVENT_TYPE_BOTH: |
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* |
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* The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM. |
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*/ |
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#define GST_EVENT_TYPE_BOTH \ |
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(GST_EVENT_TYPE_UPSTREAM | GST_EVENT_TYPE_DOWNSTREAM) |
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#define GST_EVENT_TYPE_SHIFT 4 |
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/** |
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* GST_EVENT_MAKE_TYPE: |
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* @num: the event number to create |
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* @flags: the event flags |
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* |
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* when making custom event types, use this macro with the num and |
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* the given flags |
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*/ |
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#define GST_EVENT_MAKE_TYPE(num,flags) \ |
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(((num) << GST_EVENT_TYPE_SHIFT) | (flags)) |
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#define FLAG(name) GST_EVENT_TYPE_##name |
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/** |
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* GstEventType: |
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* @GST_EVENT_UNKNOWN: unknown event. |
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* @GST_EVENT_FLUSH_START: Start a flush operation |
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* @GST_EVENT_FLUSH_STOP: Stop a flush operation |
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* @GST_EVENT_EOS: End-Of-Stream. No more data is to be expected to follow |
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* without a NEWSEGMENT event. |
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* @GST_EVENT_NEWSEGMENT: A new media segment follows in the dataflow. |
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* @GST_EVENT_TAG: A new set of metadata tags has been found in the stream. |
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* @GST_EVENT_BUFFERSIZE: Notification of buffering requirements |
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* @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements |
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* that the downstream elements are being starved of or |
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* flooded with data. |
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* @GST_EVENT_SEEK: A request for a new playback position and rate. |
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* @GST_EVENT_NAVIGATION: Navigation events are usually used for communicating |
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* user requests, such as mouse or keyboard movements, |
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* to upstream elements. |
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* @GST_EVENT_LATENCY: Notification of new latency adjustment. Since: 0.10.12 |
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* @GST_EVENT_CUSTOM_UPSTREAM: Upstream custom event |
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* @GST_EVENT_CUSTOM_DOWNSTREAM: Downstream custom event that travels in the |
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* data flow. |
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* @GST_EVENT_CUSTOM_DOWNSTREAM_OOB: Custom out-of-band downstream event. |
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* @GST_EVENT_CUSTOM_BOTH: Custom upstream or downstream event. |
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* In-band when travelling downstream. |
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* @GST_EVENT_CUSTOM_BOTH_OOB: Custom upstream or downstream out-of-band event. |
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* |
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* #GstEventType lists the standard event types that can be sent in a pipeline. |
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* |
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* The custom event types can be used for private messages between elements |
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* that can't be expressed using normal |
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* GStreamer buffer passing semantics. Custom events carry an arbitrary |
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* #GstStructure. |
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* Specific custom events are distinguished by the name of the structure. |
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*/ |
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/* NOTE: keep in sync with quark registration in gstevent.c */ |
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typedef enum { |
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GST_EVENT_UNKNOWN = GST_EVENT_MAKE_TYPE (0, 0), |
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/* bidirectional events */ |
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GST_EVENT_FLUSH_START = GST_EVENT_MAKE_TYPE (1, FLAG(BOTH)), |
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GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (2, FLAG(BOTH) | FLAG(SERIALIZED)), |
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/* downstream serialized events */ |
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GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (5, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)), |
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GST_EVENT_NEWSEGMENT = GST_EVENT_MAKE_TYPE (6, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)), |
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GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (7, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)), |
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GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (8, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)), |
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/* upstream events */ |
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GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (15, FLAG(UPSTREAM)), |
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GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (16, FLAG(UPSTREAM)), |
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GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (17, FLAG(UPSTREAM)), |
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GST_EVENT_LATENCY = GST_EVENT_MAKE_TYPE (18, FLAG(UPSTREAM)), |
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|
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/* custom events start here */ |
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GST_EVENT_CUSTOM_UPSTREAM = GST_EVENT_MAKE_TYPE (32, FLAG(UPSTREAM)), |
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GST_EVENT_CUSTOM_DOWNSTREAM = GST_EVENT_MAKE_TYPE (32, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)), |
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GST_EVENT_CUSTOM_DOWNSTREAM_OOB = GST_EVENT_MAKE_TYPE (32, FLAG(DOWNSTREAM)), |
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GST_EVENT_CUSTOM_BOTH = GST_EVENT_MAKE_TYPE (32, FLAG(BOTH) | FLAG(SERIALIZED)), |
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GST_EVENT_CUSTOM_BOTH_OOB = GST_EVENT_MAKE_TYPE (32, FLAG(BOTH)) |
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} GstEventType; |
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#undef FLAG |
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|
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/** |
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* GST_EVENT_TRACE_NAME: |
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* |
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* The name used for memory allocation tracing |
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*/ |
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#define GST_EVENT_TRACE_NAME "GstEvent" |
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|
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typedef struct _GstEvent GstEvent; |
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typedef struct _GstEventClass GstEventClass; |
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|
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#define GST_TYPE_EVENT (gst_event_get_type()) |
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#define GST_IS_EVENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EVENT)) |
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#define GST_IS_EVENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_EVENT)) |
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#define GST_EVENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_EVENT, GstEventClass)) |
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#define GST_EVENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_EVENT, GstEvent)) |
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#define GST_EVENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_EVENT, GstEventClass)) |
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#define GST_EVENT_CAST(obj) ((GstEvent *)(obj)) |
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|
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/** |
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* GST_EVENT_TYPE: |
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* @event: the event to query |
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* |
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* Get the #GstEventType of the event. |
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*/ |
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#define GST_EVENT_TYPE(event) (GST_EVENT_CAST(event)->type) |
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|
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/** |
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* GST_EVENT_TYPE_NAME: |
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* @event: the event to query |
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* |
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* Get a constant string representation of the #GstEventType of the event. |
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*/ |
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#define GST_EVENT_TYPE_NAME(event) (gst_event_type_get_name(GST_EVENT_TYPE(event))) |
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|
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/** |
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* GST_EVENT_TIMESTAMP: |
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* @event: the event to query |
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* |
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* Get the #GstClockTime timestamp of the event. This is the time when the event |
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* was created. |
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*/ |
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#define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp) |
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/** |
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* GST_EVENT_SRC: |
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* @event: the event to query |
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* |
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* The source #GstObject that generated this event. |
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*/ |
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#define GST_EVENT_SRC(event) (GST_EVENT_CAST(event)->src) |
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/** |
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* GST_EVENT_IS_UPSTREAM: |
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* @ev: the event to query |
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* |
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* Check if an event can travel upstream. |
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*/ |
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#define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_UPSTREAM) |
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/** |
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* GST_EVENT_IS_DOWNSTREAM: |
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* @ev: the event to query |
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* |
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* Check if an event can travel downstream. |
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*/ |
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#define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_DOWNSTREAM) |
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/** |
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* GST_EVENT_IS_SERIALIZED: |
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* @ev: the event to query |
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* |
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* Check if an event is serialized with the data stream. |
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*/ |
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#define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_SERIALIZED) |
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|
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/** |
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* gst_event_replace: |
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* @old_event: pointer to a pointer to a #GstEvent to be replaced. |
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* @new_event: pointer to a #GstEvent that will replace the event pointed to |
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* by @old_event. |
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* |
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* Modifies a pointer to a #GstEvent to point to a different #GstEvent. The |
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* modification is done atomically (so this is useful for ensuring thread safety |
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* in some cases), and the reference counts are updated appropriately (the old |
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* event is unreffed, the new one is reffed). |
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* |
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* Either @new_event or the #GstEvent pointed to by @old_event may be NULL. |
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* |
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* Since: 0.10.3 |
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*/ |
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#define gst_event_replace(old_event,new_event) \ |
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gst_mini_object_replace ((GstMiniObject **)(old_event), GST_MINI_OBJECT (new_event)) |
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|
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/** |
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* GstSeekType: |
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* @GST_SEEK_TYPE_NONE: no change in position is required |
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* @GST_SEEK_TYPE_CUR: change relative to current position |
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* @GST_SEEK_TYPE_SET: absolute position is requested |
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* @GST_SEEK_TYPE_END: relative position to duration is requested |
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* |
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* The different types of seek events. When constructing a seek event with |
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* gst_event_new_seek(), a format, a seek method and optional flags are to |
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* be provided. The seek event is then inserted into the graph with |
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* gst_pad_send_event() or gst_element_send_event(). |
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*/ |
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typedef enum { |
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/* one of these */ |
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GST_SEEK_TYPE_NONE = 0, |
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GST_SEEK_TYPE_CUR = 1, |
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GST_SEEK_TYPE_SET = 2, |
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GST_SEEK_TYPE_END = 3 |
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} GstSeekType; |
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|
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/** |
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* GstSeekFlags: |
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* @GST_SEEK_FLAG_NONE: no flag |
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* @GST_SEEK_FLAG_FLUSH: flush pipeline |
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* @GST_SEEK_FLAG_ACCURATE: accurate position is requested, this might |
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* be considerably slower for some formats. |
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* @GST_SEEK_FLAG_KEY_UNIT: seek to the nearest keyframe. This might be |
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* faster but less accurate. |
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* @GST_SEEK_FLAG_SEGMENT: perform a segment seek. |
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* |
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* Flags to be used with gst_element_seek() or gst_event_new_seek(). All flags |
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* can be used together. |
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* |
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* A non flushing seek might take some time to perform as the currently |
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* playing data in the pipeline will not be cleared. |
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* |
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* An accurate seek might be slower for formats that don't have any indexes |
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* or timestamp markers in the stream. Specifying this flag might require a |
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* complete scan of the file in those cases. |
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* |
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* When performing a segment seek: after the playback of the segment completes, |
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* no EOS will be emmited by the element that performed the seek, but a |
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* #GST_MESSAGE_SEGMENT_DONE message will be posted on the bus by the element. |
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* When this message is posted, it is possible to send a new seek event to |
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* continue playback. With this seek method it is possible to perform seemless |
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* looping or simple linear editing. |
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*/ |
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typedef enum { |
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GST_SEEK_FLAG_NONE = 0, |
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GST_SEEK_FLAG_FLUSH = (1 << 0), |
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GST_SEEK_FLAG_ACCURATE = (1 << 1), |
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GST_SEEK_FLAG_KEY_UNIT = (1 << 2), |
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GST_SEEK_FLAG_SEGMENT = (1 << 3) |
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} GstSeekFlags; |
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|
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|
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/** |
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* GstEvent: |
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* @mini_object: the parent structure |
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* @type: the #GstEventType of the event |
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* @timestamp: the timestamp of the event |
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* @src: the src of the event |
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* @structure: the #GstStructure containing the event info. |
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* |
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* A #GstEvent. |
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*/ |
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struct _GstEvent { |
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GstMiniObject mini_object; |
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|
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/*< public >*/ /* with COW */ |
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GstEventType type; |
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guint64 timestamp; |
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GstObject *src; |
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|
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GstStructure *structure; |
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|
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/*< private >*/ |
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gpointer _gst_reserved; |
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}; |
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struct _GstEventClass { |
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GstMiniObjectClass mini_object_class; |
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/*< private >*/ |
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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const gchar* gst_event_type_get_name (GstEventType type); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GQuark gst_event_type_to_quark (GstEventType type); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GstEventTypeFlags |
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gst_event_type_get_flags (GstEventType type); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GType gst_event_get_type (void); |
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|
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/* refcounting */ |
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/** |
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* gst_event_ref: |
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* @event: The event to refcount |
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* |
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* Increase the refcount of this event. |
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* |
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* Returns: @event (for convenience when doing assignments) |
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*/ |
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#ifdef _FOOL_GTK_DOC_ |
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G_INLINE_FUNC GstEvent * gst_event_ref (GstEvent * event); |
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#endif |
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|
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static inline GstEvent * |
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gst_event_ref (GstEvent * ev) |
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{ |
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/* not using a macro here because gcc-4.1 will complain |
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* if the return value isn't used (because of the cast) */ |
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return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT (ev)); |
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} |
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|
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/** |
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* gst_event_unref: |
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* @ev: The event to refcount |
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* |
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* Decrease the refcount of an event, freeing it if the refcount reaches 0. |
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*/ |
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#define gst_event_unref(ev) gst_mini_object_unref (GST_MINI_OBJECT (ev)) |
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|
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/* copy event */ |
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/** |
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* gst_event_copy: |
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* @ev: The event to copy |
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* |
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* Copy the event using the event specific copy function. |
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*/ |
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#define gst_event_copy(ev) GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT (ev))) |
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|
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/* custom event */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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386 |
|
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387 |
|
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const GstStructure * |
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gst_event_get_structure (GstEvent *event); |
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|
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/* flush events */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GstEvent * gst_event_new_flush_start (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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400 |
|
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GstEvent * gst_event_new_flush_stop (void); |
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402 |
|
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/* EOS event */ |
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404 |
#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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407 |
|
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GstEvent * gst_event_new_eos (void); |
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409 |
|
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|
410 |
/* newsegment events */ |
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|
411 |
#ifdef __SYMBIAN32__ |
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|
412 |
IMPORT_C |
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|
413 |
#endif |
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changeset
|
414 |
|
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|
415 |
GstEvent* gst_event_new_new_segment (gboolean update, gdouble rate, |
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|
416 |
GstFormat format, |
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|
417 |
gint64 start, gint64 stop, |
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|
418 |
gint64 position); |
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|
419 |
#ifdef __SYMBIAN32__ |
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|
420 |
IMPORT_C |
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|
421 |
#endif |
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diff
changeset
|
422 |
|
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|
423 |
GstEvent* gst_event_new_new_segment_full (gboolean update, gdouble rate, |
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|
424 |
gdouble applied_rate, |
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Revision: 200949
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|
425 |
GstFormat format, |
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|
426 |
gint64 start, gint64 stop, |
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|
427 |
gint64 position); |
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Revision: 200949
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diff
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|
428 |
#ifdef __SYMBIAN32__ |
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|
429 |
IMPORT_C |
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|
430 |
#endif |
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|
431 |
|
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|
432 |
void gst_event_parse_new_segment (GstEvent *event, |
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|
433 |
gboolean *update, |
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|
434 |
gdouble *rate, |
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|
435 |
GstFormat *format, |
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|
436 |
gint64 *start, gint64 *stop, |
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|
437 |
gint64 *position); |
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|
438 |
#ifdef __SYMBIAN32__ |
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|
439 |
IMPORT_C |
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|
440 |
#endif |
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|
441 |
|
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|
442 |
void gst_event_parse_new_segment_full (GstEvent *event, |
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|
443 |
gboolean *update, |
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|
444 |
gdouble *rate, |
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|
445 |
gdouble *applied_rate, |
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Revision: 200949
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|
446 |
GstFormat *format, |
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|
447 |
gint64 *start, gint64 *stop, |
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|
448 |
gint64 *position); |
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Revision: 200949
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|
449 |
|
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Revision: 200949
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|
450 |
/* tag event */ |
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|
451 |
#ifdef __SYMBIAN32__ |
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|
452 |
IMPORT_C |
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|
453 |
#endif |
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|
454 |
|
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Revision: 200949
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|
455 |
GstEvent* gst_event_new_tag (GstTagList *taglist); |
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|
456 |
#ifdef __SYMBIAN32__ |
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|
457 |
IMPORT_C |
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|
458 |
#endif |
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|
459 |
|
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Revision: 200949
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|
460 |
void gst_event_parse_tag (GstEvent *event, GstTagList **taglist); |
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|
461 |
|
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Revision: 200949
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|
462 |
/* buffer */ |
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|
463 |
#ifdef __SYMBIAN32__ |
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|
464 |
IMPORT_C |
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|
465 |
#endif |
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|
466 |
|
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|
467 |
GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize, |
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|
468 |
gboolean async); |
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|
469 |
#ifdef __SYMBIAN32__ |
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|
470 |
IMPORT_C |
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|
471 |
#endif |
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|
472 |
|
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Revision: 200949
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|
473 |
void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize, |
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|
474 |
gint64 *maxsize, gboolean *async); |
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Revision: 200949
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|
475 |
|
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Revision: 200949
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diff
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|
476 |
/* QOS events */ |
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|
477 |
#ifdef __SYMBIAN32__ |
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|
478 |
IMPORT_C |
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|
479 |
#endif |
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|
480 |
|
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|
481 |
GstEvent* gst_event_new_qos (gdouble proportion, GstClockTimeDiff diff, |
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|
482 |
GstClockTime timestamp); |
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Revision: 200949
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|
483 |
#ifdef __SYMBIAN32__ |
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|
484 |
IMPORT_C |
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|
485 |
#endif |
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diff
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|
486 |
|
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Revision: 200949
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|
487 |
void gst_event_parse_qos (GstEvent *event, gdouble *proportion, GstClockTimeDiff *diff, |
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|
488 |
GstClockTime *timestamp); |
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Revision: 200949
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|
489 |
/* seek event */ |
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diff
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|
490 |
#ifdef __SYMBIAN32__ |
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|
491 |
IMPORT_C |
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|
492 |
#endif |
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Revision: 200949
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diff
changeset
|
493 |
|
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Revision: 200949
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|
494 |
GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags, |
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diff
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|
495 |
GstSeekType start_type, gint64 start, |
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Revision: 200949
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diff
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|
496 |
GstSeekType stop_type, gint64 stop); |
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Revision: 200949
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diff
changeset
|
497 |
#ifdef __SYMBIAN32__ |
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|
498 |
IMPORT_C |
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Revision: 200949
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changeset
|
499 |
#endif |
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Revision: 200949
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|
500 |
|
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Revision: 200949
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|
501 |
void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format, |
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|
502 |
GstSeekFlags *flags, |
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|
503 |
GstSeekType *start_type, gint64 *start, |
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Revision: 200949
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diff
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|
504 |
GstSeekType *stop_type, gint64 *stop); |
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Revision: 200949
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diff
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|
505 |
/* navigation event */ |
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Revision: 200949
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diff
changeset
|
506 |
#ifdef __SYMBIAN32__ |
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Revision: 200949
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diff
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|
507 |
IMPORT_C |
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Revision: 200949
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parents:
diff
changeset
|
508 |
#endif |
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Revision: 200949
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parents:
diff
changeset
|
509 |
|
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
510 |
GstEvent* gst_event_new_navigation (GstStructure *structure); |
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Revision: 200949
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diff
changeset
|
511 |
|
0e761a78d257
Revision: 200949
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diff
changeset
|
512 |
/* latency event */ |
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Revision: 200949
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diff
changeset
|
513 |
#ifdef __SYMBIAN32__ |
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Revision: 200949
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parents:
diff
changeset
|
514 |
IMPORT_C |
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Revision: 200949
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#endif |
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GstEvent* gst_event_new_latency (GstClockTime latency); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_event_parse_latency (GstEvent *event, GstClockTime *latency); |
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G_END_DECLS |
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#endif /* __GST_EVENT_H__ */ |